Thanks Dave,
The only reason to consider the 6535 was for the shielded case to help prevent static build-up & the better handling of corners.

But we have been so busy with some life altering events-I almost lost JR to a life threatening bacterial infection contracted while in surgery, he is still recovering and very busy work load so it hasn't been a high priority since the 6515 has been working great.

Take care,
Vix